OK, so here is Google's official comment on the 2 XL display concerns and a promise to fix the "clicking noise" on the 2 (a software bug on the NFC functionality, according to Google).
"We’ve received some feedback about the Pixel 2 XL displays not appearing as saturated as other phones. We attribute this perception to our choice to calibrate the Pixel 2 XL for delivering natural, accurate colors, taking advantage of the new color management support in Android 8.0 Oreo.
........
Based on the feedback we’ve received since announcing Pixel 2 and Pixel 2 XL, we learned that some users do want even more vibrant colors. So, through a software update to Pixel 2 and Pixel 2 XL, we will soon be adding a new “saturated” color mode."
And regarding the "burn-in" effect, they say:
"We’ve received reports of Pixel 2 XL devices exhibiting image retention on the screen and have been actively investigating them. Extensive testing of the Pixel 2 XL display show that its decay characteristics are comparable to OLED panels used in other premium smartphones."
Yet they are making two changes to the way the screen works:
1. The nav bar buttons at the bottom of the screen will fade out when not in use, and
2. They’re dropping the display’s maximum brightness by 50 nits — an amount they say is “almost undetectable”, but that should reduce strain on the display “significantly.”
And of particular note, they are extending the warranty on all Pixel 2 and Pixel 2 XL's from 1 year to 2 years!
Seems to me Google is telling you they are serious about their long term commitment to their hardware business.
https://productforums.google.com/fo...FWSMFcDgA;context-place=forum/phone-by-google